Drying green coffee beans is a crucial step in processing coffee after they have been harvested and milled. One effective method, as highlighted in the provided reference, is using raised beds.
Drying Green Coffee Beans Using Raised Beds
Drying green coffee beans on raised beds is a widely used technique, particularly in regions where coffee is sun-dried. This method involves spreading the beans in a thin layer on beds constructed of mesh or screens elevated off the ground.
Why Use Raised Beds?
The reference specifically points out several key advantages of utilizing raised beds for drying:
- Better Circulation of Air: Elevated beds allow air to flow freely around and through the layer of coffee beans from all sides – above, below, and the sides. This enhanced airflow is vital for even drying.
- Faster Drying: Improved air circulation directly contributes to the beans drying more quickly and efficiently compared to drying on patios or the ground.
- Lessen the Risk of Contamination: By keeping the coffee beans off the ground, raised beds significantly reduce the potential for contamination from soil, dust, mold spores, or pests that may be present on the surface.
Using raised beds helps ensure that the beans dry uniformly and reach the desired moisture content (typically 10-12%) safely and effectively, preserving the quality of the final coffee product. The beans must be regularly turned or raked to promote even drying and prevent mold growth.
